MCIMX281AVM4B Freescale Semiconductor, MCIMX281AVM4B Datasheet - Page 686
MCIMX281AVM4B
Manufacturer Part Number
MCIMX281AVM4B
Description
IC MPU I.MX28 1.2 289MAPBGA
Manufacturer
Freescale Semiconductor
Series
i.MX28r
Datasheets
1.MCIMX283DVM4B.pdf
(2327 pages)
2.MCIMX283DVM4B.pdf
(20 pages)
3.MCIMX281AVM4B.pdf
(72 pages)
Specifications of MCIMX281AVM4B
Core Processor
ARM9
Core Size
32-Bit
Speed
454MHz
Connectivity
CAN, EBI/EMI, Ethernet, I²C, MMC, SmartCard, SPI, SSI, UART/USART, USB OTG
Peripherals
DMA, I²S, LCD, POR, PWM, WDT
Program Memory Size
128KB (32K x 32)
Program Memory Type
Mask ROM
Ram Size
32K x 32
Voltage - Supply (vcc/vdd)
1.25 V ~ 5.25 V
Data Converters
A/D 17x12b
Oscillator Type
External
Operating Temperature
-40°C ~ 85°C
Package / Case
289-LFBGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Number Of I /o
-
Eeprom Size
-
Lead Free Status / Rohs Status
Supplier Unconfirmed
- Current page: 686 of 2327
- Download datasheet (17Mb)
Operation
9.2.3.3 Input Interrupt Operation
Programming and controlling a digital pin as a GPIO interrupt input is accomplished by
programming the appropriate bits in six registers, as shown in the figure below.
686
• After setting the HW_PINCTRL_MUXSELx register for GPIO, the
• The HW_PINCTRL_IRQSTATx register bit should then be cleared to ensure that there
• Setting the HW_PINCTRL_PIN2IRQx register bit will then set up the pin to be an
• At this point, if an interrupt event occurs on the pin, it will be sensed and recorded in
• However, the interrupt will not be communicated back to the interrupt collector until
HW_PINCTRL_IRQLEVELx and HW_PINCTRL_IRQPOLx registers set the interrupt
trigger mode. A GPIO interrupt pin can be programmed in one of four trigger detect
modes: positive edge, negative edge, positive level, and negative level triggered.
are no interrupts pending when enabled.
interrupt pin.
the appropriate HW_PINCTRL_IRQSTATx bit.
the HW_PINCTRL_IRQENx register bit is enabled.
i.MX28 Applications Processor Reference Manual, Rev. 1, 2010
Figure 9-3. GPIO Input Setup Flowchart
Read HW_PINCTRL_DINx register bit
Write zero to HW_PINCTRL_DOEx
register bit to ensure pin is selected
Write to HW_PINCTRL_MUXSELx
register bit to select pin as GPIO.
HW_PINCTRL_PULLx to enable
to get the value on the pin.
internal pull-up resistors.
If applicable, set bits in
as an input.
Begin
End
Freescale Semiconductor, Inc.
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